

Technically, 29" tyres are just extra-fat 28" tires, the rim diametre is 622 mm for both tyres. Surprisingly, 27" tyres have a larger rim, 630 mm, than 29" tyres.
The other parameter limiting the use of the tube is the width of the tyre. As 27" tyres have a maximum size of 35-630, 29" tyres start at 50-622. Thus, the tube for 27"/28" tyres will be somewhat overly inflated (according to it’s specification) in a 29" tyre.
https://www.schwalbe.com/media/29/9b/36/1711611433/faq_reifengroessen_28032024.pdf

































Usually, I’d expect Hungarian families outside of ‘core’ Hungary to be named Magyar. Otherwise it wouldn’t be useful for telling families apart. E.g. in Germany people named Westphal usually don’t live in Westphalia, but in the north-east, where people from Westphalia moved during the east settlement in the middle age.